Musnad Ahmad 658:207

Hashim ibn al-Qasim narrated to us, he said: Zuhayr narrated to us, Abu Ishaq narrated to us, from al-Bara’ ibn ‘Azib, who said: I was with the Messenger of Allah, may Allah bless him and grant him peace, and he said: "Call Zayd for me; let him come with the shoulder blade and the inkwell, or the tablet and the inkwell." [He said:] "Write: 'Those of the believers who sit [at home] are not equal' [An-Nisa: 95] 'to those who strive in the way of Allah' [An-Nisa: 95]." He said: "Thus it was revealed." He said: Then Ibn Umm Maktum said, while he was behind his back: "O Messenger of Allah, I have an impairment in my eyes." He said: So it was revealed before he departed: "Except those who have an impairment" [An-Nisa: 95].